Xylem CentriPro PC PLUS Installation, Operation And Maintenance Manual Download Page 8

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STARTING

When the unit is connected to the electrical supply, the green led “Power On”
lights up and the yellow led “On” (Pump in operation) indicates that the pump has
been started.

The pump continues to operate for 8-10 seconds enabling the pipes in the
system to ﬁll and reach the required pressure.

FUNCTIONING

The starting operation is now achieved and the unit is programmed to perform
all the pump control operations automatically.

MP PLUS Automatic restart and anti-jamming function

In case of stopping due to a water shortage, the device will automatically make
10 double attempts to rearm over the 24 hours following the failure, each lasting
approximately 5 seconds to allow the pump and the system to reload if possible.

In the event of water shortage, after the last failed rearming attempt the device
will stop to automatically rearm and will sit in stand-by and signal failure.

After 24 hours it will make a single rearming attempt of 5 seconds, and if in this
case it ﬁnds water it will reset and repressurise the system but if it will not ﬁnd
water it will return in failure and will try to rearm again after 24 hours.

This process can always be bypassed by manual reset. The anti-jamming
function, is always active even in case of failure due to water shortage.

TROUBLESHOOTING GUIDE

PROBLEM

POSSIBLE CAUSE

SOLUTION

The pump
does not
start

The electronic card is broken

Pump jammed

Voltage failure

Electric cables
inverted (line/motor)

The pump
does not
stop

The electronic card is broken

Presence of leaks

which are higher than

the minimum ﬂow of

1L/min

The ﬂow detector is blocked in
the upper position

The device has been installed
in horizontal position

Intermittent
pump
working

Presence of system leaks which
are lower than a minimum ﬂow
of 1L/min

The pump is
jammed

The electronic card is broken

See Pump Pressure paragraph

on page 5

Water failure

Suction problems

STARTING

When the unit is connected to the electrical supply, the green led “Power On”
lights up and the yellow led “On” (Pump in operation) indicates that the pump has
been started.

The pump continues to operate for 8-10 seconds enabling the pipes in the
system to ﬁll and reach the required pressure.

FUNCTIONING

The starting operation is now achieved and the unit is programmed to perform
all the pump control operations automatically.

MP PLUS Automatic restart and anti-jamming function

In the event of water shortage, after the last failed rearming attempt the device
will stop to automatically rearm and will sit in stand-by and signal failure.

This process can always be bypassed by manual reset. The anti-jamming
function, is always active even in case of failure due to water shortage.

TROUBLESHOOTING GUIDE

PROBLEM

POSSIBLE CAUSE

SOLUTION

The pump does

not start

The pump does

not stop

Intermittent

pump working

-- SSyysstteem

m iiss aallrreeaaddyy uunnddeerr pprreessssuurree

--FFaauullttyy ppuum

mpp ccaappaacciittoorr

--PPuum

mpp iiss jjaam

meedd

--FFrroonntt ppaannnneell lleedd lliigghhttss aarree ooffff

--D

Deevviiccee iinnssttaalllleedd iinn hhoorriizzoonnttaall

ppoossiittiioonn

--PPrreesseennccee ooff fflloow

--TTaapp cclloosseedd aanndd pprreesseennccee ooff aa bbiigg

eexxppaannssiioonn ttaannkk

--SSyysstteem

m lleeaakkss hhiigghheerr tthhaann tthhee

miinniim

muum

m fflloow

--FFlloow

w vvaallvvee bblloocckkeedd iinn tthhee uuppppeerr

ppoossiittiioonn

--PPrreesseennccee ooff ssyysstteem

m lleeaakkss lloow

weerr

tthhaann tthhee m

miinniim

muum

m fflloow

w ooff 11 LL//m

miinn

--PPrreessssuurree ggeenneerraatteedd ffrroom

m tthhee

ppuum

mpp iiss ttoooo lloow

--PPuum

mpp iiss ddiisscchhaarrggeedd

--CClloosseedd TTaapp..

-- TThhee ccoolluum

mnn ooff w

waatteerr oovveerr tthhee

ddeevviiccee iiss hhiigghheerr tthhaann tthhee rreessttaarrtt

pprreessssuurree ooff tthhee ddeevviiccee..

--CChheecckk ppuum

mpp ccaappaacciittoorr..

--RReem

moovvee tthhee oobbjjeecctt m

meecchhaanniiccaallllyy

jjaam

miinngg tthhee ppuum

mpp ..

-- CChheecckk ppoow

weerr ssuuppppllyy..

-- CChheecckk w

wiirriinngg..

-- EElleeccttrroonniicc ccaarrdd m

maayy bbee bbrrookkeenn..

--IInnssttaallll tthhee ddeevviiccee iinn vveerrttiiccaall

ppoossiittiioonn..

--CChheecckk iiff aannyy ttaapp iiss ooppeenn aanndd iinn

tthhaatt ccaassee cclloossee iitt..

--IInn tthhiiss ccaassee,, tthhee ppuum

mpp w

wiillll ssttoopp

tthhee ppuum

mpp iinn aa lloonnggeerr ttiim

mee;; tthhaatt

ddeeppeennddss oonn tthhee pprreessssuurree ttaannkk ssiizzee

aanndd iittss pprreessssuurree..

--CChheecckk iiff tthheerree aarree lleeaakkss iinn tthhee

ssyysstteem

m..

--CChheecckk tthhee pprreesseennccee ooff ffoorreeiiggnn

bbooddiieess iinn tthhee ddeevviiccee..

--CChheecckk iiff tthheerree aarree lleeaakkss iinn tthhee

ssyysstteem

m..

--TThhee ppuum

mpp iiss nnoott ccoom

mppaattiibbllee w

wiitthh

tthhee rreessttaarrtt pprreessssuurree ooff tthhee ddeevviiccee..

-- TThhee ppuum

mpp iiss oolldd aanndd hhaass lloosstt

eeffffiicciieennccyy ccoom

mppaarreedd ttoo tthhee ppuum

mppss

ssppeecciiffiiccaattiioonnss..
--CChheecckk tthhee ccoorrrreecctt pprriim

miinngg ooff tthhee

ppuum

mpp..

-- PPrreesseennccee ooff aaiirr iinn tthhee ssyysstteem

m..

INSTALLATION AND STARTUP

The device can be installed directly on the pump or between the pump and the first tap.
Make all the electrical connections, check that the pump is correctly primed, open a tap and
energize. From now on, the device will turn the pump on and off depending on the opening and
closing of the tap. In case of water shortage, the device will stop the pump and protect it from dry
running (red “Failure” led blinking).
In case of a temporary blackout, the device will automatically rearm once the electricity returns.

AUTOMATIC RESTART/REARM

In case of stopping due to a water shortage, the device will automatically make 10 double at-
tempts to rearm over the 24 hours following the failure, each lasting approximately 5 seconds to
allow the pump and the system to reload if possible.
After the last failed rearming attempt, the device will remain permanently in alarm (red Failure
LED blinking) pending manual rearming by pressing the “Restart” button.
The user can always try to rearm the device at any time by pressing the Restart button.
After 24 hours it will make a single rearming attempt of 5 seconds, and if in this case it finds water
it will reset and repressurise the system but if it will not find water it will return in failure and will
try to rearm again after 24hrs.
If water returns at any time during the rearming procedure, the device will automatically restart.

The simplified time sequence of the double rearms is as follows:

ANTI-JAMMING FUNCTION

If for any reason the pump remains idle for 24 consecutive hours, the device will carry out a start-
up of the pump for about 5 seconds (anti-jamming function).

rearm attempt after failure

rearm attempt after the previous attempt